Method of producing packing for the impression cylinder of printing machines



Nov. 10, 1931. c. WINKLER 1,831,761

. METHOD OF PRODUCING PACKING FOR THE IMPRESSION CYLINDER 0F PRINTING MACHINES Filed May 27. 1930 INVENTOR Caz-Z Winkler ATTORNEYS Patented Nov. 10,

UNITED STATES PATENT OFFICE CARL WINKLER,. OF BERN, SWITZERLAND METHOD or raonccme PACKING- ron THE IMPBESSION CYLINDER or PRINTING MAcnINns Application filed May 27, 1930, Serial No. 456,086, and in Germany September 22, 1928.

My invention relates to a method of producing a packing suitable for the impression cylinder of printing machines, and the new feature consists in adding to a paper or cardboard p1.1lphereinafter called paper pulp some elastic stufi', preferably cork, in finely divided condition.

In carrying out my invention the cork, or other elastic material, is mixed Well with the paper pulp, by mechanical, or hand, stirring,

l and, in the paper or cardboard making machine, the mixture is made up into one or more 3 layers. This can be done in the usual way by a sieve cylinder which dips into the mixture 5 of paper pulp and cork, or the like, and applies a thin layer to a felt, which contacts with another cy1inder,- on which the pulp is applied in several layers over each other.

With the object of still further increasing the elasticity of the packing, rubber, in the form oflatex, can be added to the paper pulp.

By experiment it has been found that cork can be mixed with paper pulp if the cork is sufficiently finely divided, and care is taken to prevent the cork from collecting in irregular bunches near the sieve cylinder.

In the drawings a machine for making the packing according to my invention is shown by way of'example,

gig. 1 being a diagrammatic side elevation, an

Fig. 2 a plan. The perforated or sieve cylinder a rotates, as usual in a vat b and transfers a paper pulp to the felt belt 0 which runs over the rolls d, e and transfers one layer after the other to the cylinder f. On this cylinder 7 the sheets formed by the repeated layers of strained pulp applied are periodically cut 40 longitudinally and removed from the cyl.

inder. c

In the vat b cork, in very finelyv divided condition, isadded to the pulp and. well mixed with same by stirring. During the stirring process, rubber in'the condition known as latex can be added.

layer of which consists in mixing paperpulp with cork powder and rubber-in the form of latex, and forming a sheet from said mixture.

In testimony whereof I have signed my name to this specification.

CARL WINKLERQQ What I desire to secure by Letters Patent is:

The method of producing packing for the 50 impression cylinders of printing machines 

